Insulated panel



1kb. 11, 1941. K T NYSTRQM 2,231,216

INSULATED PANEiI Filed Dec. 51, 1938 Hg 5 Hg 6 [We/wf: Kar/ TM5/fam Patented Feb. l1, 1941v I l I o l 'UNITED' STATES PATENT oFFicE INSULATED PANEL Karl T. Nystrom, Chicago, Ill., assignor to Standard Railway Equipment Manufacturing Company, Chicago, Ill., a corporation of Delaware Application DecemberSI, 1938, Serial No. 248,858

2 Claims. (Cl. 189-34) The invention relates to insulated panels, such around the plates III-II. Insulating members as are co-mmonly used on refrigerator cars. Re- I4 are made of wood, fibre or other material havfrigerator cars usually have a doorway in each ing both great strength and low thermal conside wall and insulated doors adapted to close ductivity. A pair of spaced apart metallic plates 5 the doorways. Hatches are also usually provided I5-I6 are disposed between the sheets Ill- II in the roof of a refrigerator car for the loading and are provided with anges I1-I8. 'I'he bolts of refrigerant and the panel hereinafter de- I9, or other fastening means, preferably extend scribed may be adapted for use asia hatch plug completely through the members I4 and secure for closing the hatches and doorways. Panels the flanges I2-I3 and the anges II-I8 therelo cf the type described may also be used for floor, to. The nuts 25 which engage the bolts I9 should 1o walls, or roof of a refrigerator car. be welded to the flanges I1-I8 to facilitate as* It is an object of this invention to provide a sembly. Well insulated panel. There is usually a differ- In actual service, the sheets III and II would be ence in temperature between the inside and outat different temperatures and are insulated from 1? side of a refrigerator car, the inside being colder each other by the members I4, thus retarding 1o during summer when the car is used under reheat conductivity through the panel. Insulation frigeration and the outside being colder during is provided between the plates I5--I6 and the winter when the car is supplied with heat. It is air spaces 2| protect the insulation 20 from a further object of the invention to provide a, moisture which may condense on the inside sursubstantially metal panel in order to obtain faces of l the sheets Ill-I I. The sheets IIJ-II 20 strength and endurance, and a further object are preferably prOvided with corrugations 22-23 to insulate metal parts from each other. Metal to increase the stiiness thereof and the plates is a very good conductor of heat, and an unob- I5-I6 may have perforations 24 to decrease the structed path of metal for thefloor of heat beweight thereon 25- tween the inside and the outside would detract Fig- 4 Shows modification in Which the flange 25 to a considerable extent from the efliciency of 0f the Plate 3| Projects in the Same dreCtOIl the car as a, refrigerator or as a heater, as the flange 32 of the plate 33. The corruga- Another object of the invention is to provide a tions 34 in the Sheet 35 are Shown extendlg panel which may be easily assembled. A feature4 Parallel With the long Side of the Panel While 30 which contributes to ease of assembly is the inthe cormgations 36 io the Sheet' 31 extend trans' 30 sulation retainer which also functions as a jig Versoly to the long side of the panelfor assembly purposes; In Fig. 5 the anges 45-46 of the plates A further object of the invention is to provide gagsljttgvgretegl cglgli'g 35 an air Space ad'lant the insulation' If an ob- 5I in the sheet 52 extend transversely to the long 35 Ject has a temperature below the dew polnt of Side of the panel.

the air in contact therewith, moisture will be I condensed from the air upon said object. Since In the modlca'tion shown in Flg 6 the mem' the eiciency of insulation is greatly impaired gigs natlvzlaparshglsggsh rjt ryosr 40 by moisture I hive provided retainer Fletes cured by the bolts ss through th parts 6| of 4o which space the msfulaton from the boundmg the members 60 said bolts also securing the plates plates, thereby preventing contact between the 62 53 The sh'eet 64 is shown with the corruga insulation and cold plates with the consequent tions 61 extending transversely to the long side dampening of the insulation by condensation. of the paneL other advantages of my invention Win be ap' Fig. 7 shows a panel having pieces 'I0 disposed 45 parent from the following description by rebetween and secured to the plates 1|. 12 The ferr'mg to the drawmg 1n which: pieces'l serve to space apart the plates 'II-12 Flg- 1 1S a Plan View 0f a Panel so as to facilitate the insertion of the bolts 13 Fies- 2 arid 3 are sections on lines 2-2 and which secure the plates 1I- 12 and sheets 'M -15 3.3: I'eSDeOtlVelyto the members 16. Transversely extending cor- 50 Figs 4, 5. 6 and 7 show modified construcrugations 11 are shown in the sheets 14-15. tions. The accompanying drawing illustrates the pre- In the COHSI'UCOII'ShOWn in. Figs. t0 3, the ferred form of the invention, though it is to be metallic Sheets |0|| are. PIOVlded Wlth anges understood that the invention is not limited to |2|3 Which Preferably extend Completely the exact details of construction shown and de- 55 Cai scribed, as it is obvious that various modications thereof, within the scope of the claims, will occur to persons skilled in the art.

I claim:

1. A panel comprising a pair of substantially parallel spaced apart metallic sheets, a pair of spaced apart foraminous plate members between said sheets in spaced relation thereto, insulation between said plate members and insulating members secured to the marginal portions oi! said sheets and said plate members and arranged to maintain said spaced apart relations, said panel being substantially free of heat conducting means between said sheets and plate members.

2. A panel comprising a pair of substantialLv parallel spaced apart foraminous plate-like members, insulation between said members, a metallic sheet spaced outwardly from each of said members, insulating members interposed between the marginal portionsof said sheets, and means to secure said sheets and said plate-like members to said insulating members comprising nuts welded to said platelike members and bolts extending through said sheets and said insulating members and engaged with said nuts, said plate-like members having outwardly projecting anges arranged to space said sheets so that the bolts may be inserted in engagement with said nuts.

KARL T. NYSTROM. 

